CN205394731U - Mould structure of punch press - Google Patents

Abstract

The utility model provides a die structure of a punch press, which belongs to the technical field of mechanical equipment. It solves the technical problem of low punching efficiency and precision of the existing disposable food box punching die. The mold structure of this punching machine includes an upper die and a lower die which are set up and down oppositely. The lower surface of the upper die has an annular cut groove and the cut groove is located at the periphery of the holding groove, and the upper surface of the lower die is provided with an annular cutter and the cutter is located at the periphery of the blanking through hole ; The cutting knife is arranged opposite to the cutting groove, and the upper surface of the upper mold has a vent hole connected to the receiving groove. The utility model has higher precision and efficiency for blanking the disposable food box with flanging.

Description

Die structure of a punch press

technical field

The utility model belongs to the technical field of mechanical equipment and relates to a punching machine, in particular to a die structure of the punching machine.

Background technique

The punch press is a stamping press, which manufactures products through the stamping process, which has the advantages of saving materials and energy, high efficiency, low technical requirements for operators, and the ability to make products that cannot be achieved by mechanical processing through various mold applications. , so it is widely used. The mold on the punching machine is an important part of the punching machine. The mold exerts pressure on the material to cause separation or plastic deformation, and can make blanking, punching, forming, deep drawing, trimming, fine blanking, shaping, riveting and extrusion Parts, etc., the accuracy of the mold largely determines the processing accuracy of the product.

In recent years, disposable food boxes on the market have been made from foam materials to environmentally friendly materials, usually by injection molding or blister molding. The efficient and continuous production of automated equipment makes the initial products from injection molding or blister molding by several continuous processes. In one piece, the separation of individual products needs to be achieved by punching blanking. For the sake of beauty and safety, the existing disposable food boxes are usually designed with a downward-folding arc-shaped flange. For this kind of disposable food box, it is still punched by hand, and it needs to be considered during the punching process. The accuracy and flatness of punching, the efficiency of manual work is relatively low, and the cutting tool of the punching die is relatively thin and easily damaged.

Our patent (notification number: CN104552434A; announcement date: 2015-04-29) discloses a one-time square box automatic punching and trimming machine, including the body, square box storage bin, automatic material distribution module, automatic punching Module, automatic edge trimming module, automatic stacking module, first manipulator and second manipulator; the first manipulator is used to transfer the square box after the punching action of the automatic punching module to the automatic edge trimming module, and the second manipulator It is used to transfer the square box after the trimming action of the automatic edge trimming module to the automatic stacking module; the automatic material distribution module includes a bracket, a soft pressing block at the top of the bracket and a pair of splitters installed on both ends of the bracket. The material cylinder; the automatic punching module includes a punching die workbench and a punching cylinder and a punch arranged on one side of the die workbench; the automatic edge trimming module includes a trimming die workbench and a Trimming punch; automatic stacking module including servo motor and stocker.

The mold structure is not specifically disclosed in the above-mentioned patents, but in the prior art, the mold for blanking disposable food boxes is to place the disposable food box between the upper mold and the lower mold during the working process, and the mold on the mold The tool is relatively thin and easy to damage, and the efficiency and precision of punching are relatively low, and burrs or irregular trimming are prone to occur.

Contents of the invention

The utility model aims at the above-mentioned problems existing in the prior art, and provides a die structure of a punching machine. The technical problem to be solved by the utility model is: how to improve the accuracy and efficiency of punching the disposable food box with flanging.

The purpose of this utility model can be achieved through the following technical solutions:

A mold structure for a punching machine, comprising an upper mold and a lower mold arranged up and down oppositely, the upper mold can reciprocate toward the lower mold, and it is characterized in that a concave receiving groove is opened on the lower surface of the upper mold, so The lower mold is provided with a blanking through hole facing the accommodation groove, the lower surface of the upper mold has an annular cut groove and the cut groove is located at the periphery of the accommodation groove, and the lower mold An annular cutting knife is arranged on the upper surface of the upper die and the cutting knife is located at the periphery of the blanking through hole; the cutting knife is arranged opposite to the cutting groove, and the upper surface of the upper mold has a Vent holes for receiving slots.

Its working principle is as follows: This punching machine is suitable for punching and blanking disposable food boxes. The periphery of the disposable food box has an arc-shaped flanging, and several connected food boxes are pushed to the upper mold and the lower mold through the pushing mechanism. In between, and the disposable food box is placed in reverse, that is, the mouth of the disposable food box faces the lower mold, and the upper mold moves quickly towards the lower mold for punching. At this time, the groove of the disposable food box forms a protrusion It can be embedded in the receiving groove of the upper mold, and the cutting knife and the cutting groove move towards each other to form a shear force to cut and separate the disposable food box, and discharge a single finished product through the blanking hole of the lower mold to realize the punching of the disposable food box Blanking; In this technical solution, by changing the mold structure, the disposable food box can be reversely placed between the upper mold and the lower mold for punching, so that when the disposable food box is located on the cutter of the lower mold, its The concave side of the arc-shaped flanging is facing upwards, and the convex side is facing down. When the cutter on the lower mold moves relative to the groove on the upper mold, the arbitrary deformation of the disposable food box will be reduced. The curved convex surface of the disposable food box is stable. It falls on the cutting knife, so that the punching position is accurate and the trimming accuracy is high; at the same time, in this technical solution, in order to avoid the negative pressure generated after the convex surface of the disposable food box is embedded in the receiving groove and the material cannot be smoothly blanked, an upper surface of the upper mold is provided. There is a vent hole connected to the holding tank, which can ensure the fast and smooth blanking of the disposable food box after punching, and improve the punching efficiency.

In the mold structure of the punch press described above, the outer surface of the cutter is an inclined surface extending from the upper surface of the lower die to the top surface of the cutter. The side wall of the cutting groove can be against the outer surface of the cutting knife. By setting the outer surface of the cutting knife as an inclined plane, the cutting knife and the cutting groove do not need particularly high precision when matching, and the thickness of the cutting knife It can also be increased to still ensure that the cutting knife can contact the inner wall of the cutting groove to form a shearing movement, the failure rate of the mold is low, and the accuracy of punching is also improved while ensuring the processing efficiency.

In the mold structure of the punch press described above, the inner surface of the cutter is flush with the wall of the blanking through hole, and the bottom surface of the cutting groove extends to the groove wall of the receiving groove. In this way, a single finished product punched out can be blanked smoothly, preventing material jams and ensuring efficiency.

In the mold structure of the punching machine described above, at least two sets of the blanking through holes and cutters are arranged side by side on each of the lower dies, and at least two sets of the accommodation grooves are correspondingly provided on each of the upper dies and grooving. Such a punching action can simultaneously complete the punching and blanking of multiple disposable food boxes, thereby improving work efficiency. Preferably, two sets of blanking through holes and cutting knives are arranged side by side on the lower mold, and two sets of receiving grooves and cutting grooves are correspondingly arranged on the upper mold.

In the mold structure of the punch press described above, the mold structure also includes a base and a top plate arranged above the base, the lower mold is fixed on the base, and at least two vertical molds are fixed between the top plate and the base. The two ends of each guide column are respectively fixedly connected to the base and the top plate, and the upper mold is slidably connected to the guide column. Through the guiding effect of the guide column, the running stability of the upper die is guaranteed, thereby ensuring the precision of punching.

In the mold structure of the punch press described above, a mounting plate is provided between the top plate and the upper die, and a driving member capable of driving the mounting plate to reciprocate axially along the guide column is fixed on the top plate, and the upper die There are several connecting shafts on the top, the mounting plate is slidably sleeved on the connecting shafts, each of the connecting shafts is sleeved with a spring and the two ends of the spring act on the mounting plate and the upper die respectively. on the upper surface; the base is also provided with a number of buffer columns facing the mounting plate. The driving part drives the mounting plate to move, thereby driving the upper mold to move. The mounting plate is buffered and limited by the buffer column during the downward movement, and the impact force of the upper mold is controlled. At the same time, the connection shaft and the spring between the upper mold and the mounting plate further Cushioning, thus protecting the tool. In this technical solution, the driving part is preferably a driving cylinder, the driving cylinder is arranged vertically downward, the piston rod of the driving cylinder is fixedly connected with the mounting plate, the mounting plate is provided with a penetrating mounting hole, and the connecting shaft is inserted in the mounting hole and connected to the mounting plate. The end of the shaft also has a limit flange that prevents the mounting plate from detaching from the connecting shaft. As an alternative, the driving cylinder can be replaced by a motor, a screw nut, or the like.

In the mold structure of the punch press described above, a vertically downward cutting knife is fixed on the mounting plate, the cutting knife is located on one side of the upper mold and the blade of the cutting knife is facing the lower mold of the upper surface. When the mounting plate drives the upper die to move downward for punching, the cutting knife also moves with the mounting plate, and the blade of the cutting knife reaches the upper surface of the lower die to cut off the waste on the lower die, preventing the folding and accumulation of waste from affecting the feeding. It can ensure smooth feeding and discharging and improve efficiency.

Compared with the prior art, the utility model has the following advantages:

1. In the utility model, by changing the mold structure, the disposable food box can be reversely placed between the upper mold and the lower mold for punching. The curved flanging concave surface of the disposable food box faces upward, and the convex surface faces downward. When the cutting knife on the lower die moves relative to the groove on the upper die, the abnormal deformation of the disposable food box will be reduced, so that the punching position is accurate and the trimming precision is high.

2. In the utility model, the upper surface of the upper mold is provided with a vent hole connected to the receiving groove, so as to avoid the negative pressure generated after the convex surface of the disposable food box is embedded in the receiving groove, so as to ensure that the disposable food box after blanking is fast and smooth. Blanking improves punching efficiency.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a punching machine.

FIG. 2 is a schematic diagram of a partially enlarged structure in FIG. 1 .

Fig. 3 is a three-dimensional structural schematic diagram 1 of the mold structure.

Fig. 4 is a three-dimensional structural schematic diagram II of the mold structure.

In the figure, 1, upper mold; 11, accommodation groove; 12, cutting groove; 13, vent hole; 2, lower mold; 21, blanking through hole; 22, cutter; 3, base; 4, top plate; 5, 6. Mounting plate; 7. Buffer column; 8. Driving member; 9. Connecting shaft; 10. Spring; 1a. Cutting knife.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

This punching machine is suitable for punching and blanking disposable food boxes. The periphery of the disposable food box has arc-shaped flanging, as shown in Figures 1 to 4. The mold structure of this punching machine includes an upper mold 1 and a lower Die 2, the upper mold 1 can move back and forth toward the lower mold 2, the lower surface of the upper mold 1 is provided with a concave accommodation groove 11, and the lower mold 2 is provided with a blanking through hole 21 facing the accommodation groove 11. The lower surface of the mold 1 has an annular cutout 12 and the cutout 12 is located at the periphery of the receiving groove 11, and the upper surface of the lower mold 2 is provided with an annular cutter 22 and the cutter 22 is located at the edge of the blanking through hole 21. Periphery; the cutting knife 22 is arranged opposite to the cutting groove 12, and the upper surface of the upper mold 1 has a vent hole 13 connected to the receiving groove 11; several connected food boxes are pushed to between the upper mold 1 and the lower mold 2 by a pushing mechanism and the disposable food box is placed in reverse, that is, the box opening of the disposable food box faces the lower mold 2, and the upper mold 1 moves quickly toward the lower mold 2 for punching. At this time, the box groove of the disposable food box is formed on its reverse side. The protrusion can be embedded in the receiving groove 11 of the upper mold 1, and the cutting knife 22 and the cutting groove 12 move toward each other to form a shear force to cut and separate the disposable food box, and discharge a single food box through the blanking hole 21 of the lower mold 2. The finished product realizes the punching and blanking of the disposable food box; in this technical solution, by changing the mold structure, the disposable food box can be reversely placed between the upper mold 1 and the lower mold 2 for punching, so that when the disposable food box When the box is located on the cutting knife 22 of the lower mold 2, the concave surface of its arc-shaped flanging faces upwards and the convex surface faces downwards. Arbitrary deformation of the disposable food box, the arc-shaped convex surface of the disposable food box falls on the cutter 22 stably, so that the punching position is accurate and the trimming precision is high; at the same time, in this technical solution, in order to avoid the convex surface of the disposable food box from being embedded and accommodated Negative pressure is generated behind the groove 11 and cannot be blanked smoothly. On the upper surface of the upper die 1, there is a vent hole 13 connected to the receiving groove 11, which can ensure fast and smooth blanking of the disposable food box after blanking, and improve punching. cutting efficiency.

In this embodiment, at least two sets of blanking through holes 21 and cutting knives 22 are arranged side by side on each lower die 2, and at least two sets of receiving grooves 11 and cutting grooves 12 are correspondingly arranged on each upper die 1. Action, just can finish the punching and blanking of a plurality of disposable food boxes at the same time, improve working efficiency, as preferably, two groups of blanking through holes 21 and cutter 22 are arranged side by side on the lower die 2 in the present embodiment, upper die 1 is also provided with two sets of receiving grooves 11 and cutting grooves 12 correspondingly.

As shown in FIGS. 2 to 4 , the outer surface of the cutter 22 is an inclined plane extending from the upper surface of the lower die 2 to the top surface of the cutter 22 , and the side walls of the cutting groove 12 can abut against the outer surface of the cutter 22 , by setting the outer surface of the cutter 22 as a bevel, so that the cooperation between the cutter 22 and the groove 12 does not require particularly high precision, the thickness of the cutter 22 can also be increased, and the failure rate of the mold is reduced, ensuring The machining efficiency also improves the punching accuracy; the inner surface of the cutting knife 22 is flush with the wall of the blanking through hole 21 , and the bottom surface of the cutting groove 12 extends to the groove wall of the receiving groove 11 . In this way, a single finished product punched out can be blanked smoothly, preventing material jams and ensuring efficiency.

Further, as shown in Figures 2 and 3, the mold structure also includes a base 3 and a top plate 4 arranged above the base 3, the lower mold 2 is fixed on the base 3, and at least Two vertical guide columns 5, the two ends of each guide column 5 are respectively fixedly connected with the base 3 and the top plate 4, and the upper mold 1 is slidably connected to the guide columns 5; there is a mounting plate between the top plate 4 and the upper mold 1 6. The top plate 4 is fixed with a drive member 8 capable of driving the mounting plate 6 to reciprocate axially along the guide column 5. The upper mold 1 is provided with a number of connecting shafts 9, and the mounting plate 6 is slidably sleeved on the connecting shafts 9. All connecting shafts 9 are sleeved with springs 10 and the two ends of the springs 10 respectively act on the upper surface of the mounting plate 6 and the upper mold 1; the base 3 is also provided with some buffer columns 7 facing the mounting plate 6, and the driving parts 8 drives the installation plate 6 to move, thereby driving the upper mold 1 to move, the installation plate 6 is buffered and limited by the buffer column 7 during the downward movement, and the impact force of the upper mold 1 is controlled. At the same time, the upper mold 1 and the installation plate 6 are connected The effect of shaft 9 and spring 10 is further cushioned, thereby protects cutting tool; In the present embodiment, driving member 8 is a driving cylinder, and driving cylinder is arranged vertically downwards, and the piston rod of driving cylinder is fixedly connected with mounting plate 6, and mounting plate 6 is provided with There is a through mounting hole, the connecting shaft 9 is inserted in the mounting hole and the end of the connecting shaft 9 also has a limit flange to prevent the mounting plate 6 from detaching from the connecting shaft 9; as shown in Figure 2, the mounting plate 6 A vertically downward cutting knife 1a is fixed, and the cutting knife 1a is positioned at one side of the upper mold 1 and the blade of the cutting knife 1a is facing the upper surface of the lower mold 2. When the mounting plate 6 drives the upper mold 1 to move downward to punch When cutting, the cutting knife 1a also moves with the mounting plate 6, and the cutting edge of the cutting knife 1a reaches the upper surface of the lower mold 2 to cut off the waste on the lower mold 2, preventing the folding and accumulation of waste from affecting the feeding, so as to ensure smooth feeding And discharge, improve efficiency.

The specific embodiments described herein are only examples to illustrate the spirit of the present utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (7)

1. A die structure of a punch press, comprising a patrix (1) and a counterdie (2) that are relatively arranged up and down, and the patrix (1) can reciprocate toward the counterdie (2), characterized in that the patrix A concave accommodation groove (11) is opened on the lower surface of the mold (1), and a blanking through hole (21) facing the accommodation groove (11) is opened on the lower mold (2). The lower surface of the upper mold (1) has an annular cutout (12) and the cutout (12) is located at the periphery of the receiving groove (11), and the upper surface of the lower mold (2) is provided with An annular cutting knife (22) and the cutting knife (22) is located at the periphery of the blanking through hole (21); the cutting knife (22) is arranged opposite to the cutting groove (12), and the upper The upper surface of the mold (1) has a ventilation hole (13) connected to the receiving groove (11). 2. The mold structure of the punch press according to claim 1, characterized in that, the outer surface of the cutter (22) is an inclined surface extending from the upper surface of the lower die (2) to the top surface of the cutter (22). 3. The mold structure of the punch press according to claim 1 or 2, characterized in that, the inner surface of the cutter (22) is flush with the hole wall of the blanking through hole (21), and the cutter The bottom surface of the groove (12) extends to the groove wall of the accommodating groove (11). 4. The mold structure of the punch press according to claim 1 or 2, characterized in that, at least two groups of said blanking through holes (21) and cutting knives (22) are arranged side by side on each said lower die (2) ), each of the upper dies (1) is also correspondingly provided with at least two groups of the receiving grooves (11) and the cutting grooves (12). 5. The die structure of the press according to claim 1 or 2, characterized in that, the die structure also comprises a base (3) and a top plate (4) arranged on the base (3), the lower die (2 ) is fixed on the base (3), at least two vertical guide posts (5) are fixed between the top plate (4) and the base (3), and the two ends of each guide post (5) They are respectively fixedly connected with the base (3) and the top plate (4), and the upper mold (1) is slidably connected with the guide column (5). 6. The die structure of the press according to claim 5, characterized in that, a mounting plate (6) is provided between the top plate (4) and the upper die (1), and a fixed plate (6) is fixed on the top plate (4). A drive member (8) capable of driving the mounting plate (6) to reciprocate axially along the guide column (5) is provided, and several connecting shafts (9) are provided on the upper die (1), and the mounting plate (6) Slidingly sleeved on the connecting shaft (9), each of the connecting shafts (9) is sleeved with a spring (10) and the two ends of the spring (10) respectively act on the mounting plate (6) and On the upper surface of the upper mold (1); on the base (3) there are also several buffer columns (7) facing the mounting plate (6). 7. The die structure of the press according to claim 6, characterized in that, the mounting plate (6) is fixed with a vertically downward cutting knife (1a), and the cutting knife (1a) is located on the One side of the upper mold (1) and the cutting edge of the cutting knife (1a) are facing the upper surface of the lower mold (2).